1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75478ba1988e9b5ebc2188f1a9431d08a553f5441f244097815aee6c0634205b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f21c7113-2cb2-43e3-adf5-65d1b3d7c24f.json and https://artists.proofprofile.net/proofs/artist/f21c7113-2cb2-43e3-adf5-65d1b3d7c24f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Relaxing Guitar. Great International Hits
Here Comes the Sun (The Sound of Birds in the Forest)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7f4c84d6f4e04e1ed37432a24fa92912e6b249c05e57b1b6084e7dc8eca72e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5631300520.
Relajante Guitarra. Grandes Éxitos Internacionales
Here Comes the Sun (El Sonido de los Pajaros en el Bosque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7f4c84d6f4e04e1ed37432a24fa92912e6b249c05e57b1b6084e7dc8eca72e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5631300520.